Food can become contaminated by bacteria from other foods. This type of cross-contamination is especially dangerous if raw foods come into contact with cooked foods.Here are some examples of food-to-food cross-contamination: 1  In a refrigerator, meat drippings from raw meat stored on a top shelf might drip onto cooked vegetables placed on lower shelf.ood can become contaminated by bacteria from other foods. This type of cross-contamination is especially dangerous if raw foods come into contact with cooked foods.
Best Answer: Putting batteries in the freezer or refrigerator doesn't necessarily prolong their life. Alkaline batteries stored at room temperature self discharge at a rate of less than two percent per year. So normally refrigerating or freezing them will only help maintain their charge by a tiny amount.
Build factors that affect battery life include the type, the number and the quality of cells used. Generally, battery health and longevity declines further into a battery's life and as a function of the number of charge cycles it has gone through. However, there are a number of things a user can do to extend battery life. Both lithium polymer and lithium ion batteries tend to benefit from partial discharges to enable more charge cycles before performance is lost.